Tips For Boosting .NET WinForm Performance

In this MSDN article, tips were suggested for boosting .NET WinForm Performance and I summarized as follows.

1. Load fewer modules at startup
2. Precompile assemblies using NGen
3. Place strong-named assemblies in the GAC
4. Avoid base address collisions
• dumpbin can check the preferred base address of Dlls.
5. Avoid blocking on the UI thread
6. Perform lazy processing
• Some operations can be implemented in the Idle event and will be processed when applications are idle.
7. Populate controls more quickly
• The following code snippet shows how to avoid constant repainting.
  

  listView1.BeginUpdate();
  for(int i = 0; i < 10000; i++)
  {
  ListViewItem listItem = new ListViewItem("Item"+i.ToString() );
  listView1.Items.Add(listItem);
  }
  listView1.EndUpdate();

8. Exercise more control over data binding
• BindingSource can help improve performance.
  

  this.bindingSource1.SuspendBinding();
  for (int i = 0; i < 1000; i++)
  {
  tbl.Rows[0][0] = "suspend row " + i.ToString();
  }
  this.bindingSource1.ResumeBinding();

9. Reduce repainting
• Use SuspendLayout method whenever possible to minimize the number of Layout events.
• Call Invalidate method and pass the area that needs to be repainted as an argument to Invalidate.
  
10. Use double buffering
11. Manage memory usage
• If controls are added and removed from WinForm dynamically, call Dispose on them. Otherwise, extra unwanted handles would be accumulated in the process.
  
12. Use reflection wisely